Default to exporting files as WebP for new installations

Author: dtdesign

com.woltlab.wcf/option.xml

@@ -922,7 +922,7 @@ redis:wcf.acp.option.cache_source_type.redis</selectoptions>
 			<option name="attachment_image_autoscale_file_type">
 				<categoryname>message.attachment.autoscale</categoryname>
 				<optiontype>radioButton</optiontype>
-				<defaultvalue>keep</defaultvalue>
+				<defaultvalue>image/jpeg</defaultvalue>
 				<selectoptions>keep:wcf.acp.option.attachment_image_autoscale_file_type.keep
 image/jpeg:wcf.acp.option.attachment_image_autoscale_file_type.jpeg</selectoptions>
 			</option>

constants.php

@@ -201,7 +201,7 @@
 \define("ATTACHMENT_IMAGE_AUTOSCALE", 1);
 \define("ATTACHMENT_IMAGE_AUTOSCALE_MAX_WIDTH", 1024);
 \define("ATTACHMENT_IMAGE_AUTOSCALE_MAX_HEIGHT", 1024);
-\define("ATTACHMENT_IMAGE_AUTOSCALE_FILE_TYPE", '');
+\define("ATTACHMENT_IMAGE_AUTOSCALE_FILE_TYPE", 'image/jpeg');
 \define('LOG_MISSING_LANGUAGE_ITEMS', 0);
 \define('PRUNE_IP_ADDRESS', 30);
 \define('BREADCRUMBS_HOME_USE_PAGE_TITLE', 1);